Markert Motor Works Dyno Thread (many inside)

[328ijunkie]

best stock cam S52 vs best stock cam/airbox s54

[328ijunkie]

Highest stockish one weve seen was a bottom up stock rebuild with headers on stock US tune did 295 (shown on first post), tuned to 317whp on stock airbox/cams. Most M50 manifold S52s dyno around 230-235 on our dyno, with nice ass headers and a more agressive tune ive done ~255whp on stock cams S52, so youre getting ~60whp for 4-5k+ not to mention the powerband increase.

[ForcedFirebird]

that's fine. They will make 320+ with a tune and light mods.

Epic's race car was making 380+ with cams, air box and his tuning.

[nando]

With all the hype and the price of S54, I am not impressed at all.

that's fine. They will make 320+ with a tune and light mods.

[DesertBMW]

With all the hype and the price of S54, I am not impressed at all.

[328ijunkie]

I was using that as somewhat of an example of this dyno reading ~3-4% low. :P
That is normal numbers (on our dyno) for a good E46M3 (stock)

[ForcedFirebird]

Advertised was 333hp at the flywheel, this means there is a massive drop in horsepower trough the drivetrain (61 hp drop)

A little on the high side for parasitic loss at ~18%. Typically if you multiply the WHP by .82-.85 (15-18%), you have an idea. 333 x .82 = 276. Yes, 61hp seems like a lot, but when you make more power, you tend to lose more at the wheels.

Non-rebuilt Spec e30's do about 150whp (~10% loss over advertised), but e30's less rotating mass with the brakes, hubs, less gears in the transmission, smaller differential gears etc etc.

Keep in mind catalyst, big mufflers, A/C, P/S etc also cause losses.

EDIT: Customer in line before me at the last dyno session had an e46m3 with Alpha-N and carbon air box made 280whp.

[DesertBMW]

Another bone stock E46M3 272STD=~268SAE

Advertised was 333hp at the flywheel, this means there is a massive drop in horsepower trough the drivetrain (61 hp drop)

[328ijunkie]

Another bone stock E46M3 272STD=~268SAE

[nando]

yeah, people hate on dynojets for "reading high" (whatever that means) but they're very consistent and you can't really fudge the numbers.

[digger]

Update 4/7/15
No tuning here, just a dyno to dyno comparison... Car is an M52 318ti, M50 manifold, S52 Cams, Headers, Exhaust, 3.5" MAF, BBTB
A shops dyno in atlanta with their tune on it:


Same car same tune on the dyno we use (Switched run to SAE because the other shops dyno is run on SAE):


STD Run:

thats a different model dyno? land and sea?

i went through data for 9 other "stock" E46M3 dynos on a DJ getting rid of the outliers that read quite low and high

for each separate data point i used the maximum number as some had 3 curves run in succession etc

TQ RANGE 227-242wtq AVE: 234whp
HP RANGE 276-283whp AVE: 279whp

yours was 233/276 when reduced by ~2% to estimate SAE.

gotta hand it to dynojet they are pretty consistent when each of these dynos is a different physical machine scattered around a large continent.

where as locally on a dyno dynamics shootout ive seen 180rwkw vs 210rwkw you get a bif difference between different shops

[M-technik-3]

Ah using a S52 manifolds and OBD II mid section and getting a E30 Stromung mated to it. Hoping it's not too obnoxious.

After it's done i might give you a line a flash tune for the car. runs much like you just posted .

[328ijunkie]

AFAIK, Ebay headers and a nice 2-1 merge (2.75) and vibrant mufflers... wasnt terribly loud

[M-technik-3]

What exhaust was that Ti running?

[328ijunkie]

Update 4/7/15
No tuning here, just a dyno to dyno comparison... Car is an M52 318ti, M50 manifold, S52 Cams, Headers, Exhaust, 3.5" MAF, BBTB
A shops dyno in atlanta with their tune on it:


Same car same tune on the dyno we use (Switched run to SAE because the other shops dyno is run on SAE):


STD Run: